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AP® Microeconomics · Unit 3 · Topic 3.1

The Production Function: Topic Checklist (Microeconomics 3.1)

Specific “I can…” statements for the production function and diminishing marginal returns, each linked to the guide section and practice question that shows whether you can really do it.

Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.

Understanding

  • I can explain what a production function shows and why it is measured in units of output, not money. (Guide: “From inputs to output”)
  • I can define the short run and the long run by whether inputs are fixed, not by the calendar. (Guide: “Short run and long run”; Practice Q2)
  • I can define total product, marginal product and average product in words. (Guide: “Total, marginal and average product”)
  • I can explain why marginal product often rises at first, using specialisation. (Guide: “How marginal product changes: three stages”)
  • I can explain why diminishing marginal returns happen, using the fixed input, and why they are a short-run idea. (Guide: “How marginal product changes: three stages”; Practice Q6)

Calculation and graphing

  • I can calculate MP and AP from a total product table, with units. (Guide: Worked example 1; Practice Q1)
  • I can rebuild total product from a table of MP (running sum) or of AP (AP × L). (Guide: Worked example 2; Practice Q4, Q7)
  • I can identify the worker with whom diminishing marginal returns begin, and tell it apart from where AP starts to fall and where MP turns negative. (Guide: Worked example 1(c); Practice Q3, Q4)
  • I can sketch TP above MP and AP, with MP cutting AP at its maximum and TP peaking where MP = 0. (Guide: Figures 1 and 2; Practice Q5)

Reasoning

  • I can explain why AP rises when MP is above it and falls when MP is below it, with a numerical example. (Guide: “The three curves and how they are linked”; Practice Q7)
  • I can explain why diminishing marginal returns do not mean total product is falling. (Guide: “Common misconceptions”; Practice Q3)
  • I can explain how more capital or better technology shifts the production function, and why adding capital is a long-run change. (Guide: “What shifts the production function”; Practice Q6)

All ticked? Move on to Topic 3.2, Short-Run Production Costs, or return to the course roadmap.

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